Fix segmentation fault in mesh_filter/gl_renderer

[CihatAltiparmak]

Description

The misusage of std::map is fixed.

Checklist

• [ ] Required by CI: Code is auto formatted using clang-format
• [ ] Extend the tutorials / documentation reference
• [ ] Document API changes relevant to the user in the MIGRATION.md notes
• [ ] Create tests, which fail without this PR reference
• [ ] Include a screenshot if changing a GUI
• [ ] While waiting for someone to review your request, please help review another open pull request to support the maintainers

[CihatAltiparmak]

It was done.